Tappet for stamp-mills.



UNTTED STATES PATENT OFFICE.

JAMES C. H. VAUGHT, OF PHILLIPSBURG, MONTANA.

TAPPET FOR STAM PflVllLLS.

SPECIFICATION formngrpar't of Letters Patent No. 703,680, dated July 1, 1902. Application filed August 15, 1899. Renewed November 16, 1901. Serial No. 82,591. (No modem T0 all whom t may concern:

Be it known that I, JAMES C. H. VAUGHT, a citizen of the United States, residing at Phillipsburg, inthe county of Granite and State of Montana, have invented a new and useful Tappet for Stamp-Mills, of which the following is a specification.

The invention relates to improvements in tappets for stamp-mills.

The objects of the present invention are to improve the construction of tappets for stampmills, to increase their strength, durability, and efficiency, and to provide a simple and comparativel)T inexpensive one adapted to be readily applied to a stamp-stem at any point on the same and capable of being readily removed when desired.

A further object of the invention is to enable the bottom portion of the tappet which is worn by the actuating-cam to be readily renewed when necessery without discarding the entire tappet; and another object of the invention is to provide a simple and efficient locking device for securing such removable portion to the bodyof the tappet and to prevent the same from vibrating orrattling when a stamp-mill is in operation.

The invention consists in the construction and novel combination and arrangement of parts hereinafter fully described, illustrated in the accompanying drawings, and pointed out in the claims hereto appended.

In the drawings, Figure l is a perspective View of a tappet constructed in accordance with this invention. Fig. 2vis a vertical sectional view. Figs. 3 and 4: are detail views 'of the upper conical clamping-thimble. Fig.

5 is a similar view of the lower clampingthimble. Fig. 6 is a detail view of the wedge. Fig. 7 is a detail sectional view illustrating the construction of the malleable keys which provide lugs for engaging the tappet.

Like numerals of reference designate corresponding parts in all the igures of the drawings.

1 designates a stamp-mill tappet having its upper and lower ends enlarged, as illustrated in Figs. l and 2'of the 4accompanying drawings, to secure sufficient strength to prevent effectually any liability of the tappet splitting while it is being secured to a stamp-stem 2 or while a stamp-mill is in operation. The

tappet has its longitudinal opening or bore enlarged toA provide upper and lower iiaring openings 3 and 4, adapted to receive upper and lower compressible conical sleeves 5 and 6, designed to operate as wedges for clamping the tappet to the stem 2, and as the wedgeshaped or conical sleeves are reversely arranged and taper inwardly the tappet will be securely' locked against upward or downward movement on the stem.

In assembling the parts the lower conical sleeve, which is resilient, is tirst placed on the stem, and the tappet isthen placed in po y'sition, the sleeve 6 being received within the 'lower tlared or tapered portion of the bore and( being forced into engagement with the stem and the tappet by driving the latter downward. The sleeve 6 is provided on its interior with a series of horizontal corrugations 7, forming horizontal ribs or threads which bite into the stem, whereby the sleeve is lirmly interlocked therewith and is effectually prevented from slipping thereon. The stem 2 is constructed of soft iron, and the sleeve, which is constructed of steel or other resilient material, is adapted to cut its way readily into the soft stem, and it is split vertically at 8, as clearly illustrated in Fig. 5 of the accompanying drawings.

The upper resilient sleeve, which is composed of two sections S, is adapted to be compressed and is provided with an opening 9 for the reception of a wedge 10, and it is also provided on its interior with oppositely-.inclined corrugations 11, forming longitudinally-inclined ribs or threads, which when the upper sleeve is forced downward are adapted to embed themselves in a stamp-stem and cause the sections to hug the stem and be ed downward. The vertical edges of the split portion of the upper sleeve are out away to provide an opening for the wedge 10, which is driven between the ends or edges formed by the said split portion, whereby the sleeve is fixed in its engagement with the stem and the tappet. The sleeve 5 is provided at its upper edge with an outwardly-extending annular iiange 12, adapted to be engaged by a suitable tool, whereby the sleeve may be readily extracted -lrom the opening or bore or" the tappet when it is desired to remove the latter from the stem. The wedge, which pro- ICO jects above the `upper face of the sleeve 5, is provided with an outwardly-extending fiange 13,1whicl1 is also adapted to be engaged by a I300 The lower end of the tappet, which is engaged by a cam in the usual manner, is protected by a cap 14, constructed, preferably, of cast metal and adapted to receive the wear caused by the cam, and as the said cap is detachably secured to the tappet by the means hereinafter described it may be readily removed and renewed when necessary. The cap, which is cylindrical to tit the lower portion of the tappet, is provided in its bottom, which may be of any desired thickness, with an opening to receive the stem 2 and to permit the passage of the lower sleeve G, and its sides are provided at their upper edges at intervals with tapering dovetailed notches or recesses l5, receivingr the removable keys 16, which form lugs for engaging the lower shoulder of the tappet. The lower enlargement forms a shoulder 17, and the lugs 16 are bent inward over the shoulder, whereby the cap is held in position. The keys 16, which are constructed of malleable metal, and which are adapted to be readily bent, as before described, have tapered lower portions, which fit in the recesses l5, and the latter are inwardly beveled to form outwardly-converging side walls, as clearly illustrated in Fig. 7 of the accompanying drawings. The keys are engaged with the recesses prior to the application of the cap to the tappet, and they are retained in engagement with the cap by the said tappet.

In order to enable the cap to be firmly held on the Tappet and to prevent any rattling or vibration, an elastic or compressible gasket 1S is interposed between the bottom of the cap and the lower end of the tappet, This gasket is compressed, preferably by hydraulic pressure, while the cap is being applied to the tappet, and after the lugs are bent inward over the shoulder of the tappet the gasket will expand sufficiently to hold the cap perfectly tight.

The inven tion has the following advantages: The tappet, which is simple and comparatively inexpensive in construction, possesses suiicient strength to prevent elfectually any liability of it splitting accidentally while it is being secured to the stem, orduring the operation of the stamp-mill in which it is employed. The wear caused by the actuatingcam is received by the cap, which is adapted to be renewed without discarding the entire tappet. The cap may be constructed of cast metal, and the malleable keys, which are adapted to be bent inward into engagement with the lower shoulder of the tappet, securely fasten the cap to the latter. The reversely-arranged wedge-shaped sleeves lock the tappet against movement in either direction on the stem, the horizontal ribs or threads of the lower sleeve hold the said sleeve against upward or downward movement on the stem, and the inclined threads or ribs formed by the corrugations of the upper sleeve feed the latter downward on the stem. The upper sleeve and the threads may be readily removed when desired, and the tappet may then be disengaged from the lower sleeve.

Changes in the forni, proportion, size, and the minor details of construction within the scope of the appended claims may be resorted to without departing fromthe spirit or sacrific-ing any of the advantages of this invention.

What is claimed isl. In a device ofthe class described, the combination with a stamp-stem, and a tappet having a daring opening, of a compressible conical or wedge-shaped sleeve provided with oppositelydisposed longitudinally-inclined ribs arranged to embed themselves in the stamp-stem and adapted when the sleeve is compressed ,to feed the same inward to tighten the parts, substantially as described.

2. In a device of the class described, the combination with a stamp-stem, and a tappet having a tapering opening, of a conical or wedge-shaped sleeve composed of two sections having oppositely-inolined corrugations forming longitudinally-inclined ribs arranged to embed themselves in the stamp-stem,whereby the sections will be fed inward to tighten the parts when they are compressed,substantiall y as described.

3. In a device of the class described, the combination with a stamp-stem and a tappet having a tapering opening, of a sleeve composed of two sections and provided with a longitudinal opening, said sections being provided with ribs inclining downward or inward from opposite sides of the said opening and adapted to embed themselves in the stampst-em to feed the sections downward or inward, and means for engaging the sections at the said opening, substantially as described.

4. A device of the class described comprising a tappet, a lower tapering or wedgeshaped sleeve fitting within the lower end of the tappet and provided with horizontal corrugations or ribs adapted to engage a stampstem, and an upper tapering orwedge-shaped sleeve provided with longitudinally-inclined ribs or corrugations adapted to engage the stamp-stem whereby the upper sleeve is fed downward, substantially as and for the purpose described.

5. A device of the class described comprising a tappet, and upper and lower resilient wedge-shaped sleeves split longitudinally, the lower sleeve being provided with horizontal threads or ribs, and the upper sleeve being provided with two sets of oppositely-inclined threads or ribs, substantially as described.

6. In a device of the class described, the combination with a stamp-stem, and a tappet having a tapering opening, of an upper tapering sleeve provided with a longitudinal opening and having oppositely-disposed 1ongitudinally-inclined ribs arranged to embed IOO themselves in the stamp-stem, and a longitudinal Wedge arranged vin the'longitudinal opening, substantially as described.

7. A device of the class described comprising a tappet havingv a tapering opening, an upper tapering sleeve arranged in the tapering opening and having an outwardly-extending iiange and provided with an opening, and a Wedge having a iiange and fitting in the opening of the sleeve, substantially as' described.

8. A device of the class described comprising a tappet, having an exterior shoulder, and a cap tting on the tappet and provided at its edges with a series of lugs bent'inward and engaging the shoulder of the tappet, substantially as described.

9. A device of the class described comprising a tappet, a cap, and a series of keys de- In testimony that I claim the foregoing as A my own I have hereto affixed my signature in the presence of two witnesses. JAMES O. H. VAUGI-IT.

Witnesses:

J. Ross OoLHoUN,

M. PERRY HAHN. 

